2004 Harley Sportster 1200C DK Customs Thunder Torque Insterts

This video is part of an exhaust sound comparison. 2004 Harley Sportster 1200 Custom with Screamin Eagle II exhaust, baffles removed and DK Customs Thunder Torque Insterts (W158) installed. Cold start. Bike has Arlen Ness big sucker and rejet.
I personally found that the difference between the Screamin Eagle II with baffles and without baffles with DK TTI inserts is that with the TTI mod I lost low end torque and low mid torque. I have an increase in high mid and high end torque. The bike runs much worse when first started with the choke engaged and takes longer to get running smooth from a cold start. The sound is much louder and covers a wider frequency range.

[@Padames]

What kind of seat is that ?